According to soviet data, ex. RT-86 INDIGA has number 73 as watch-boat (not minelayer, not minesweeper but сторожевой корабль). She stranded 12.10.1943 on sandbank in Enissey bay and was abandoned 17.10.43. SKR Nr. 14 PRILIV was sunk by Focke-Wulfs 190 from 14./JG 5 in Kildin bay 03.08.1943.